Multiple choice

Average weight of $8$ boys is $57$ kgs, if weights of seven of them are $65, 43. 29, 37, 82, 50$ and $55$ kgs, then weight of the eighth student is

  1. 45 kgs

  2. 55 kgs

  3. 65 kgs

  4. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The total weight of 8 boys is 8 × 57 = 456 kg. The seven listed weights total 361 kg, so the eighth student weighs 95 kg, which is not among the given choices.

AI explanation

The total weight of all 8 boys is 8 multiplied by 57, which equals 456 kgs. Adding the weights of the seven given boys gives a sum of 361 kgs. Subtracting 361 from 456 gives the weight of the eighth student as 95 kgs. Since 95 kgs is not listed in the options, the result is none of these.

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